Fig 2.

Kaplan-Meier curves for overall survival (OS) in resection margin-positive (A) and resection margin-negative (B) stage II and III thymoma patients. For resection margin-positive stage II and III thymoma, S + RT had higher OS than S alone (P = 0.006). For margin-negative stage II and III thymoma, no significant differences were observed between S + RT versus S alone (P = 0.733) (solid line: S alone; dotted line: S + RT).